Road
Crashes on the B4278
218 recorded collisions since 2000.
218
All crashes
4
Fatal
22
Serious
192
Slight
Since 2000 the B4278 has seen 218 collisions, 4 of them fatal and 22 serious. That ranks it 1950th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 18.3 per 1,000 collisions, and 12% caused death or serious injury. Collisions have risen by about 50% since 2000, from 4 to 6 in 2024. The heaviest local concentrations are in Rhondda Cynon Taf.
Worst local authorities on the B4278
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Crashes by year
2000–202420151050
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.